239232
Calcium hydroxide
ACS reagent, ≥95.0%
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Fórmula lineal:
Ca(OH)2
Número CAS:
Peso molecular:
74.09
NACRES:
NB.24
PubChem Substance ID:
UNSPSC Code:
12352305
EC Number:
215-137-3
MDL number:
Assay:
≥95.0%
Grade:
ACS reagent
Form:
powder
Servicio técnico
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ACS reagent
Quality Level
assay
≥95.0%
form
powder
impurities
≤0.03% insol. in HCl, ≤0.1% S compounds, ≤3.0% calcium carbonate
pH
12.4-12.6 (20 °C)
density
2.24 g/mL at 25 °C (lit.)
anion traces
chloride (Cl-): ≤0.03%
cation traces
Fe: ≤0.05%, K: ≤0.05%, Mg: ≤0.5%, Na: ≤0.05%, Sr: ≤0.05%, heavy metals: ≤0.003% (by ICP)
SMILES string
O[Ca]O
InChI
1S/Ca.2H2O/h;2*1H2/q+2;;/p-2
InChI key
AXCZMVOFGPJBDE-UHFFFAOYSA-L
General description
Calcium hydroxide is commonly used in wastewater treatment plants (WWTPs) to adjust pH. Calcium hydroxide has numerous applications due to its strong basic characteristics. Uses include flocculants in water and sewage treatment, a whitewash ingredient, soil improvement, as a lye substitute in non-lye hair relaxers, and in the liming industry to neutralize the acid.
Application
Calcium hydroxide can be used:
- In the pretreatment of technical lignin during the pyrolysis in a fluidized bed reactor to overcome the agglomeration to produce phenolic-rich bio-oil.
- As a catalyst in the pyrolysis of pinewood in a fixed bed reactor.
signalword
Danger
hcodes
Hazard Classifications
Eye Dam. 1 - Skin Irrit. 2 - STOT SE 3
target_organs
Respiratory system
Clase de almacenamiento
13 - Non Combustible Solids
wgk
WGK 1
flash_point_f
Not applicable
flash_point_c
Not applicable
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The antibacterial effect of camphorated paramonochlorophenol, camphorated phenol and calcium hydroxide in the treatment of infected root canals.
A Bystrom et al.
Endodontics & dental traumatology, 1(5), 170-175 (1985-10-01)
U Schröder
Journal of dental research, 64 Spec No, 541-548 (1985-04-01)
The findings from the recent literature on pulpal cell responses to the application of calcium hydroxide to exposed pulps are described. The effect of calcium hydroxide on healthy and inflamed pulp is discussed. The effect of incorporation of calcium hydroxide
Lisbet Mailin López González et al.
Bioresource technology, 131, 250-257 (2013-01-29)
Different pre-treatment severities by thermo-alkaline conditions (100°C, Ca(OH)2) on press mud were evaluated for different pre-treatment time and lime loading. COD solubilization and the methane yield enhancement were assessed. The biochemical methane potential was determined in batch assays under mesophilic